THE IMPROVEMENT OF HIGH YIELD PULP STRENGTH BY ALTERNATELY DEPOSITING CATIONIC STARCH AND CMC
The layer-by-layer deposition technique is one of the molecule self-assembly systems which have attracted attentions of papermaking scientists in the recent years. The technique was employed to modify high yield pulp (HYP) fibers to improve their strength in this article. Cationic starch (CS) with different substitution degree was used as cationic polyelectrolyte and CMC as anionic polyelectrolyte. Changes of pulp slurry Zeta potential showed cationic starch and anionic CMC were alternately adsorbed on the surface of fiber. With deposited layers increasing, the adsorption amount of CS rose. Substitution degree of CS had effects on adsorption amount. The larger substitution degree of CS is, the smaller adsorption amount is. Both deposition number and substitution degree of CS affected pulp strength. The tensile strength and tear strength of HYP sheet increased greatly in the initial two layers and then leveled off with CS and CMC alternate deposition. The bulk, opacity and light scattering coefficient of HYP sheet decreased a little bit with CS and CMC alternate deposition. Finally, the results showed the layer-by-layer deposition technique is a promising method for improving high yield pulp.
High yield pulp Layer-by-layer deposition Strength Cationic starch CMC
Gaosheng Wang Wanbin Zhang Chunlan Liu Rong Zhang
Tianjin Key Lab of Pulp & Paper Engineering,Tianjin University of Science and Technology Tianjin 300457, China
国际会议
International Mechanical Pulping Conference 2011(2011国际机械浆学术会议)
西安
英文
422-425
2011-06-26（万方平台首次上网日期，不代表论文的发表时间）